On Saturday, June 17th, Charles will celebrate his first Trooping of Colour as monarch.

Spectators can experience the procession in person by standing along the edge of the parade route.

Beyond each year’s celebration, Trooping the Colour is an event steeped in history.

Royal family reacting to Trooping the Colour

Here’s a deeper look at the backstory of the monarch’s birthday parade with the unusual name.

“Trooping” involved officers moving up and down the lines so everyone could see the flag up close.

The parade morphed into a birthday celebration in 1748, again due to practical considerations.

Solider marching with a drum

In 1760 George III followed in his grandfather’s footsteps and made the birthday parade a yearly tradition.

By 2022, the celebration and parade were back up to their usual location and number.

In 2022, many of the royal family members honored Queen Elizabeth by wearing her favorite color, blue.

Queen Elizabeth looking stoic as Prince Louis yells with hands over his ears and Kate Middleton talks

In 1988, Prince Harry stuck out his tongue Princess Diana held him.

Trooping the Colour also provides interesting behind-the-scenes photos.

His pictures of Louis and Charlotte waving from the window occurred moments before Louis' first-ever balcony appearance.